DSH 589 Spray-on insulation system

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DSH 589 ( F* |. x; ]9 o

Spray-on insulation system ! [5 a. H' i; _9 G

General

61730-1(ed.1) & 61730-2(ed.1) 5 H* {1 P! o* \  ?& j! [

+ A" G6 \7 P4 k) C) |9 g7 tStandard(s)- IEC 61730-1, -2 Sub clause(s): DSH No 589
( ^& P8 d. t; _6 s0 t2 i, p4 B, RPage: 1(1)
  f4 J  z$ \! F% nSubject: Spray-on insulation
0 p( t) M; D& B9 n5 s+ _+ Q8 ksystem
Key words:
4 s/ a3 U6 M+ NSprayed insulation system
Decision approved by the CTL
( I7 j6 R. w) t' G6 Kduring its 43rd meeting in
1 J2 R6 k  y; U& F0 QJohannesburg
Question: A manufacturer has presented a new type of insulation (backsheet) for use on PVmodules.
The insulation material (plastic) is sprayed onto the back of the module. After it is hardened, a
: C& {2 U# m( B+ V5 S8 csecond layer is sprayed onto the module. These 2 layers passed all tests of IEC 61730-1 and -2.
Basic standards (e.g. IEC 60364-4-41 clause 4.12.1) do not allow varnish/paint to be used as
insulation. Spray-on insulation is something like paint but IEC 61730-1 and -2 say nothing against
5 f- N/ R' ^' t, T4 O) l. ssuch an insulation.
/ g, z5 s3 U" q8 V) L8 nIs the use of a spray-on, or similar type of electrical and environmental coating system allowable
for certification to IEC 61730-1 and IEC 61730-2?
Decision:
Requirements for construction and performance as specified in IEC 61730-1:2004 and IEC 61730-
6 X% r9 a- T+ k- r2:2004, respectively, are sufficient for evaluation of unique insulating systems on photovoltaic
1 L6 L1 F0 ^' v. N4 i( [modules. Although these standards provide suitable rationale for evaluating the construction and
performance of the samples obtained by the CBTL, the issue of certification remains at the
discretion of the NCB.